Dipper-tooth



Patented Feb. 10, 1920.

gwfrsagon E ATTORNEY UNITED STATES PATENT OFFICE.

VOORHEES N. SEAL, OF CARLISLE, PENNSYLVANIA. ASSIGNOR T0 THE FROG. SWITCH & MANUFACTURING COMPANY, O]? CARLISLE. PENNSYLVANZA. A CGRPORATIDN OF PENNSYLVANIA.

DIPPER-TOGTH.

To aZZ whom it may concern Be it known that I, Voonnnrzs N. SEAL, a citizen of the United States, residing at Carlisle, in the county of Cumberlaml and State of Pennsylvania, have invented con tain new and useful Improvements in l)ip per-Tceth, of which the following a specifieation.

This invention relates to teeth for dippers for excavating and similar machii'ies, and particularly to a two-part dipper tooth com prising a supporting base or shank having a wedge-sl1aped nose and a detachable, reversible and renewable bi'l'urcated point supported by said nose, the object of the iuvention being to provide a structure of the character specified havin improved means for locking or interlocking the two parts thereby to prevent the spreading of the bifurcated ends of the point, and which means will also take the strain off of the bolt used to connect the point and base and thus prevent the shearing off of such bolt.

The bifurcated point is usually connected to the nose by means of a bolt. The side thrusts on the tooth in operation and the sudden dropping of the dipper frequently causes the shearing off of the bolt due to the tendency of the bifurcated ends of the point to spread.

In the present improvement I have pro vided a very simple, inexpensive and eflicient means of preventing the spreading of the bifurcated ends of the point, and thus have prevented the tendenc of the bolt to shear in operation.

In the drawings accompanying and forminn; a part of th specification, Figure 1 is a top viewxof ti nnproved dipper. tooth; Fig. 2 is aside partly sectional view thereof; Fig. 3 is a perspective view of the point; Fig. l is a perspective view of the nose end of the base; Fig. 5 is a cross-sectional view taken on linen-(i Fig. 2; Fig. 6 is a crossscctional view taken on line bb Fig. 2; and Fig. 7 is a partly sectii uil view taken on line c:- Fig. 2.

Similar ch ieters of reference indicate corresponding parts in the several figures of the drawings.

In the preferred form thereof, herein shown, this improved tooth comprises a suitable base 2 having a forwardly projceting stepped nose 3. and which nose is provided with two pairs of lugs, the lugs ateaeh side Specification of Letters Pa teat.

Patented Feb. 10, 1920.

Serial No. 320.562.

being shown located in alineinent one ton wardl of the other. The lugs -l---l are located at the apex of the nose or on the forward step thereof. while the lugs 55 are located as it were at the base of the nose or on the rearward step thereof, and project forwardly of a recessed portion forming: the step (S of the nose, which portion or intermediate step (5 is provided with a bolt opening 25 adapted to receive the bolt for attaching the point and nose. The two sets of hugs are located substantially midway of the width of the nose. The base is of course provided with the usual openings 7 for the reception of the bolts for attaching the base to the shovel or dipper and the base is shown as bifurcated as at H for this purpose. The point J is providcd with a pair oi rearwarclly cxtcnding bifurcated projections or arm iii, the opposed walls or faces of which are prmlided with recesses 11 for the reception of the lugs l lwhich are helpful in preventing sidewise play of the point relatively to the bolt and therefore assist in preventinn a tendency to shear the bolt. Each bifurcated portion of the point is also providcd with a recess 12 for the reception of the lug 5. Each of these recesses 12 is provided at one part thereof with a bottom or shelf 13 for the reception of the l'uillding bolt attaching the point to the base. the opening;- for said bolt being shown at it in the point and 15 in the base. This shelf or bottom of the recess l2 also so located that it will extend under the lower portion of the lug so that the lug 5 will thus overlap this portion of the point when the point is fitted to the nose and consequently these lugs 5 will prevent the spreading of the bifurcated point adjacent to the attaching bolt'while at the same time the lugs 5 will assist in preventing, together with the lugs 4, any shitting or sidewise play of the point relatively to the nose.

I am aware of Patent No. 1,275,589 to Nichols dated August 13, 1918 in which it has been attempted to prevent the s reading of the bifurcated arms and point by means of dove-tailed lugs and recesses, but there are certain disadvantages in this construction,first inthat they are rather expensive to form and unless these dove-tailed projections are accurately fitted they are not as eliieient as they should be and the accurate fitting thereof is expensive since is tedious mail i In tho presinij overlzi ipiw lint liliie min snrfiuse-s an! 1 the can in h i and this 1mm M (an in, rmiii i iiwi.

It Wiil thus he Hist i hunnn videil n (my sil'n iiw L-ivni i'oi" mw illi iog llli spreading; of the i l 1i poinls Flllll on n'hiCh is rilisieni owl on nhivh in creases the hoiiii: ii' Fin; isill so that shearing Iililii It will :il o shnpml now oi he constriirleii :nwl mush, the point is not only iii-is reversible.

It \\'iil he mivrslooei {heal the mrl'ms cletails only in mor Hi l ss shunmi without (h parting fr m o iiril or iln; present ill!ilj'ln'ill'i li,

in the gm? o? imgoox'enwnl ii will 3'0 oil mas o til'ii the wwlg o nose sin? the point urn so i to in intvi'iwimig nnis ol' l ll om: us .inc'l in {set ill ables thalmlii .54: J lo is. hr-nigh niL-rl a -kiwi mljzweni :o wi l recesses underlapping sziirl ings, and :1 bolt ronneeting said point and nose nnil ynssiiig through said shelf.

:2. In a structure of the class described,

(he voinliiinition of a l aise having a Wedge-' simpmi l!l$1i",,r klill nose having two sets of outsiiiniiinu pl'fll'f'l'lilnS one behind the other, a l il'im-nim jiliiili having: two sets of recesses for u'w ww it ion of suirl projections, one pair oi will I'LQPPJ'H l ming: shelf nnderlnpping in 1: dipper loolll. the combination of a. wedge-slowed nose havin a pair of forn'nrilly projw'ting lugs :uljzn-ent to the base xiii-mil. s l noso being recessed below said lugs and owing il holt opening forwardly of said inn :1 Mini-("uteri point havinga, pair of rei-i-ssw: for the rel-option of said lugs and innin at the. busiof said recesses nshelf nmiilml wish u holt opening and which shelf is in position to l)(' overlapped in the rear of snhi bolt opening by the lugs of the nose, and a bolt passing through said bolt openings {or secnring the point and nose toge-lhw.

4. in a! {ii nor tooth the combination of a. n'mlgv-siinnwl nose having a pair of formo-ill pi iir-i-iin lngrs adjacent to the base tin-wot. min nose living recessed below said ling-s owl hm hip 21 imli opening forwardly of sii in; bifurcated pointhavin apair of ri-wssvs for the reception of sniL lugs and liming :il till liaise of snicl recesses a shelf lzrmiiml with :i holtopeningmnl which shelf is in position in he overlapped in the rear of Milli limit o ning: by the lugs of the nose, said now al o lzzn'ingg' iorn'nnlly of said lugs anliih on 1:?" lil fs Zuni said point also having in li-oni o! ifs Emil opening :1 pair of recesses for the mention of' sniil lust lugs.

.3. in :1 is K tooth, the combination of n lmsv in ring :1 forwardly projecting Wedgeslmpml now ill'fiVlllHl with two pairs of outsnuuling lugs. ulll' pair adjacent to the apex of said HHHP :uni the other pair adjacent b0 the lmsi- Hun-vol. said nose having a bolt owning oxtemiing thorethrough between hillli mo airs of logs, said nosehaving a i *(fi- :ai ihe 1l!I\'lll--Si(l( of each rear lug, :unl n ininrvnhul iletaehnhle and reversible point having opposed recesses for the rei-ii'lon of the 'l'orwanl lugs and a. pair of iwvs: at the rim of the bifurcated POI" lions men-r for the reception of the rear pzoievting lugs; said point having adjacent in envli of Fillli inst recesses :1 shelf or base proviilvii with a bolt opening. which shelf or l'nse is in position to he overlappodhy the roar ii'oiw'ing lugs of the base.

6. A dipper looih point having a pair of biflli'fllii'll ends. enrh provided with a rer'ess ierminnling in a base or shelf located snlisizmiizillr niiiln'ay between the sides of tho point mid helves having a bolt opening then-through. Q

7. A (ll )lJEl' tooth point having a pair of bifurcatec ends, each providi-al with a re cess terminating in a base or shell having a bolt opening theretlu'ough, the side walls of the recess projecting rearwardly beyond the Shelf.

8. A dipper tooth point having a pair of bifurcated ends, eaeh provided with a reeess terminating in a base or shell' having a bolt opening therethrough, said point also having a pair of opposed recesses 9. A dipper t oth point having a pair of bifurcated ends, each. provided with a shell. having a bolt opening, said point having: at two sides of said bolt opening a pair ot' recesses.

10. A dipper tooth base having a Wedgeshaped nose provided with a pair oi lor wardlv projecting lugs adjacent to the base of said nose, each lorated suhstantially midway between the sides of said none said nose having a bolt opening at th front of the lugs and in proximity thereto.

11. In a structure oi the rl deer: il-eih the combination of a point a sup ii rting base having a nose adapted to support oilltl point and provided with a forwardly rojecting lug overlapping the rear end of mid point, and a bolt passing through the point. and base from top to bottom thereof for holding them together.

12. A dipper tooth base c mprising a wedgeshaped nose having two pairs oi pro jeeting lugs, one pair adjaeent to the base of the nose and the other pair adjacent to the apex thereof.

13. A dipper tooth base coi'ni iirisingr a Wedge-shaped nose having two pairs of pro jecting lugs, one pair fttljutullt to the base of the nose and the other pair adjm-cn to the apex thereof, said nose having a bolt opening therethrough between the two pairs of lugs.

14. A dipper tooth base {Zt)!i11i1if lll;f a wedge-shaped nose having a stepped ffii'nlth tion and provided with a bolt opening and also having a pair of forwardly projecting lugs on the rear step of said base and extending forwardly of the rear wall of the adjoining step.

15. A dipper tooth base having a wedgeshaped nose provided with a stepped formation and comprising an inner, an outer and an intermediate step, the outer step ha ring a pair of projecting lugs, the inner step having a pair of forwardly extending lugs projecting forwardly pl reanwall of the inner step and said intermediate step having a. bolt opening therethrough.

16; A dipper tooth comprising a uedggeshaped base having a stepped torniatimi consisting of an inner step, an outer step and an intermediate step, said outer step having a pair of lugs said inner step also having a pair of forwardly projecting lugs extending forwardly of the rear wall of the inner step and said inner step having therethrough a bolt opening, and a detachable and reversible bifurcatmlpoint having opposed recesses for the reception of the lugs of the outer step and also having recesses in its bifurcated ends for the reception of the lugs of the inner step, said point also having a pair of shelves adjacent to said last recesses provided with bolt openings and in position. to be overlapped by the lugs of the inner step of said base.

17, In a structure of the class described, the emuhination of a bifurcated point, a supporting" base having a wmlge-shaped nose adapted to receive said point and providiid with a pair of forwardly projecting" lugs in. position to overlap a part of the rear spacedapart ends of the point thereby to prevent the spreading of the spacedapart ends, and a bolt passingthrough the point and base from top to bottom thereof and located in Front of and in proximity to said lugs for holding ihe point and base together.

18. in a striu'ture oi the class desrribmh tlununhiuation of a bifurcated point ha\' ioll' a pair of H'r'wwd rear ends. eaeh recess havirug a bottom wall. a supporting base having a ivedgoshaped nose adapted to receive said point and provided at the base of said nose with a pair of forwardly projectinip, lugs in position to extend into the reeesses of the point .and overlap the bottom walls of said reces es" thereby to interlock the point and the base against sideivise and also top and bottom movement of the point relativel to the nose. and means fixedly 'Dl'llltfftll'ifi the base and point together and passing through said bottom walls of the reeesses at right angles to the sides of the point.

1 in a s'trueturepr the elass described, the combination of at bifurcated point havinn at its rear spared-apart ends. a pair of recesses. one in each enih each having a bot tom wall, and a supporting base having a wedge-shaped nose provided with a pair of forwardly projeetin lugs adjacent to the base of said nose ant in position to project into said recesses and overlap the bottom walls of said point recesses, the side walls of said point recesses overlapping the sides of said lugs to a greater extent than the lugs overlap the bottom walls of so id recesses, and a bolt extending through said base and bottom walls of said point adjacent to said lugs whereby hotltlateral and up and down 'nu'iveiuent of the point relatively to the base is prevented.

20. In a structure of the class described, the combination of a bifureated point, a base having a wedge-shaped nose adapted to receive said point. said nose and point having at the rear end of the point and at the base of the nose cooperating interlocking means My; n |'vm lnmlml substantially midway ll-. l\ua ;.n 11w sidw-z ml the point and provided will lml'fmn wall and 21 supporting base; having a \uwlggga-slmjml nos-u provided with :1 mi: ul' l'ul'wmwlh projecting lugs likewiwlm-ntwl :aulmixmiiully midway Between llw +i|vw of 110 1w:- umi 'Mjmunt 1.0 the base nl' v nil nosv Zlilll l'u pmiium to project into said r-uur cw and (um-lap the bottom walls 0F Hillll mint rewsscn. Um side walls of said mink l'vrm-w u\' -rlupping H10 sides of said lugs tn :1 gwmu-l' xtvnt than the lugs 0verug .lnimllnm salinn'l' Siilil THE 5 and it lmli uxti-mling tln-nugll said base and bottom all of mid oint in mm of and adjacent in will mgr: anal Substantially midway bel\\-"--H ill sialw n1" llupumt ulul the base -;ml l llill um! muse together lmum and up and down. :.:-.um;=- n thP base 

